6779907372021 has 32 divisors (see below), whose sum is σ = 10365094341888. Its totient is φ = 3861557107200.

The previous prime is 6779907371987. The next prime is 6779907372037. The reversal of 6779907372021 is 1202737099776.

It is not a de Polignac number, because 6779907372021 - 2²¹ = 6779905274869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6779907371021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107114835 + ... + 107178111.

It is an arithmetic number, because the mean of its divisors is an integer number (323909198184).

Almost surely, 2^{6779907372021} is an apocalyptic number.

It is an amenable number.

6779907372021 is a deficient number, since it is larger than the sum of its proper divisors (3585186969867).

6779907372021 is a wasteful number, since it uses less digits than its factorization.

6779907372021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79901.

The product of its (nonzero) digits is 14002632, while the sum is 60.

The spelling of 6779907372021 in words is "six trillion, seven hundred seventy-nine billion, nine hundred seven million, three hundred seventy-two thousand, twenty-one".